	@media screen and (min-width:1200px) {
	  html {
	    font-size: 20px;
	  }
	}

	@media screen and (min-width:800px) and (max-width:1200px) {
	  html {
	    font-size: 16px;
	  }
	}

	@media screen and (max-width:800px) {
	  html {
	    font-size: 12px;
	  }
	}

	* {
	  margin: 0;
	  padding: 0;
	  box-sizing: border-box;
	}

	html,
	body {
	  width: 100%;
	  height: 100%;
	  font-family: '楷体';
	  overflow: hidden;
	}

	#top {
	  width: 14.5rem;
	  height: 11.5rem;
	  border: 0.08rem solid #DCDFE6;
	  margin: 2rem auto;
	  padding: 2rem;
	  border-radius: 6px;
	}

	#top h3,
	#top p {
	  width: 100%;
	  height: 2rem;
	  line-height: 2rem;
	  line-height: 2rem;
	}

	#top h3 {
	  color: #409EFF;
	}

	#top span {
	  font-size: 2rem;
	  display: block;
	  width: 2rem;
	  height: 2rem;
	  text-align: center;
	  line-height: 2rem;
	  color: black;
	  border: none;
	  cursor: pointer;
	  transition: all .5s;
	  margin-top: 1rem;
	}

	#bottom {
	  width: 10rem;
	  height: 9rem;
	  border: 0.05rem solid #DCDFE6;
	  box-shadow: 0.5rem 0.5rem 0.5rem rgba(0, 0, 0, .5);
	  overflow: hidden;
	}

	#bottom ul {
	  width: 10rem;
	  height: 9rem;
	  list-style: none;
	}

	#bottom ul li {
	  width: 10rem;
	  height: 3rem;
	  padding-left: 1.2rem;
	  line-height: 3rem;
	  cursor: pointer;
	}

	#bottom ul li:hover {
	  background-color: gainsboro;
	}

	#bottom ul li a {
	  text-decoration: none;
	  color: black;
	}